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Troubleshooting

DFU (Bootloader) not being detected. (Windows)

Hold the boot button or use the Reset to Bootloader function in the configurator
Download and open Zadig

zadig_list_all_devices Ensure List All Devices is selected in the options.

zadig_dfu Choose STM32 BOOTLOADER in the dropdown and select WinUSB in the right hand pane.
Click Replace Driver and wait for it to finish. Try flashing again in the configurator.

No serial port showing after flashing. (Windows)

Unplug the fc and replug to ensure a power cycle
Download and open Zadig

zadig_list_all_devices Ensure List All Devices is selected in the options.

zadig_serial Choose QUICKSILVER in the dropdown and select USB serial (CDC) in the right hand pane.
Click Replace Driver and wait for it to finish. Power cycle again then try the configurator.

BMI270 filter recommendations

The bmi270 gyros internal filtering differs from what other common gyros (mpu, icm) come with. As such it needs slightly different software filtering. Recommended values are:

  • A single gyro pt2 filter at 100hz
  • About half the d-term pid gain (or kd) for Pitch and Roll, of what is specified in the presets.